Vacuum Decay Leak Testing
Optimizing Pressure Decay Leak Tests
Winning with Persistence and Proof
Chamber Leak Testing
Choosing the Right Pump: Types, Benefits, and Limitations
The Principles of Precise Dispensing
Pressure Decay Leak Testing: A Trusted Method for Precision Leak Detection
Common Manufacturing Processes That Require Leak Testing
How External Influences Affect Air Leak Testing (and How to Fix Them)
Understanding the Impact of Part and Test Volume
Leak Testing Overview
Why is “Standardized Volumetric Flow Rate” Called “Mass Flow Rate”?
Starting a Test: Pressure Decay Leak Testing – Part 5
In Part 5 of the Zaxis Pressure Decay Series, we move from setup to action: running your first leak test and using it to define a baseline for good parts.
You’ll learn how to:
– Run an initial leak test and interpret the results
– Create a “master” non-leaking part to use as a testing reference
– Observe how pressure, decay, and timing behave during a live test
– Distinguish normal thermodynamic decay from actual leaks
– Compare good and defective parts to identify true leaks
– Fine-tune timing and test steps for more accurate, repeatable results
This section focuses on performing real tests, analyzing data, and building a reliable standard to guide all future leak testing.
Test Volume and Cycle Time: Pressure Decay Leak Testing – Part 4
In Part 4 of the Zaxis Pressure Decay Series, you’ll learn how test volume affects pressure decay results, test timing, and overall production efficiency. You’ll learn how to:
- Understand the impact of test volume on pressure decay speed
- See why larger parts require longer test times
- Optimize testing for small parts with minimal internal volume
- Adjust test settings based on production rate and cycle time needs
- Use single or multi-channel Z-Series setups for higher throughput
- Scale your system to test multiple parts simultaneously for faster output
This section focuses on balancing accuracy and speed by managing test volume, part size, and automation requirements effectively.
Part Material: Pressure Decay Leak Testing – Part 3
In Part 3 of the Zaxis Pressure Decay Series, we explore how the material properties of your test part can influence pressure decay results. You’ll learn how to:
- Understand the difference between rigid and flexible test materials
- See how material flexibility affects internal pressure readings
- Recognize “elastomeric creep” and how it can mimic a leak
- Adjust your test setup to account for part movement or stretching
- Prevent false readings caused by material compliance
This section helps you identify and control the impact of part materials to ensure more accurate and consistent leak test results.
Test Pressure: Pressure Decay Leak Testing – Part 2
In Part 2 of our Pressure Decay Leak Testing Series, we dive into how to properly set up a leak test and the key factors that affect accuracy and reliability. You’ll learn how to:
- Identify the main factors that influence leak testing (pressure, material type, and volume)
- Choose an appropriate test pressure without damaging the part
- Understand how air and liquid behave differently during testing
- See how temperature and molecular activity impact pressure readings
- Recognize how normal thermodynamic effects can mimic a leak
- Adjust your setup to account for these effects and ensure accurate results
This section builds the foundation for understanding the science behind pressure decay testing and how to avoid false readings during setup.
Getting Started: Pressure Decay Leak Testing – Part 1
Welcome to Part 1 of the Zaxis Pressure Decay Leak Testing Series! This training video introduces the fundamentals of using Z-Series leak testers for assembly verification. You’ll learn how to:
- Understand the purpose of leak testing for assembly verification
- Identify when to use pressure decay vs. vacuum decay methods
- Connect and set up your Z-Series tester using the Quick Start Guide
- Provide the correct air and power requirements for operation
- Recognize key connections on the rear panel (air, power, Ethernet, USB)
- Get replacement documentation or support using your tester’s serial number
This video lays the foundation for getting started with Z-Series testers and preparing for more advanced training in upcoming parts of the series.
Chamber Testing for Leak Detection | Zaxis Tutorial
This Zaxis training video explains how to perform a chamber test using the metered volume fill technique. This method is designed for parts without a standard port for pressure or vacuum testing.
Zaxis Z8 Tutorial
Zaxis specializes in air leak test methods such as pressure decay and vacuum decay as well as positive displacement metering pumps. This video is an overview of how the new Zaxis Z8 leak tester works.
Identify a Leak
Zaxis doesn’t believe in charging our customers to identify a leak when we can provide you with the resources to solve the problem on your own. With that said, we are happy to assist you in any way possible. If your Isaac-HD leak tester is leaking, and you have identified that it is not your part, then please watch this informational video on identifying a leak in your Isaac-HD single-channel leak tester.
Calibration Video
For do it yourself calibration log in to your Zaxis customer account to access user manuals and additional documentation. Located in the user manual, we have a calibration guide for self calibration. Calibration is essential to fulfill your leak testing requirements. Our job is to make your job easier, so send us your Zaxis leak tester today for in-house calibration. Our calibration experts will ensure your product is in compliance, and ready to meet your leak testing needs.
Metered Volume Fill Pressure Decay
To leak test a sealed component, a chamber test is used. Place the part in a custom build nest and seal the chamber closed. Fill the chamber with a metered volume to a desired pressure. Then proceed with a standard pressure decay test. Any drop in pressure beyond a designated limit signifies a leak into the sealed part under test.
Using the zHMI
The new Zaxis Human Machine Interface (zHMI) software can monitor up to 30 devices at once.
What is a leak standard?
A leak standard is a calibrated, simulated leak that can be used in circuit with the part under test.
Performance Qualification
Once the IQ and OQ are completed a performance qualification is performed by taking the developed parameters and testing several lots of known parts to make sure that good parts pass and bad parts fail. Once this is done they can be reasonably confident that the tester will perform as expected and it can be released to production.
Operational Qualification
The tester is used on a statistical sample of known good parts to make sure that it produces a repeatable result. Some customers take that result and add 3 standard deviations and use that as the reject set point. If a leak rate is defined the tester is measured with a known leak standard to make sure that the results are repeatable. If no leak standard is available but a challenge sample is the same process is used to record decay values and create a reject level.
Installation Qualification
The people I spoke to verify that they have the correct air and power for our system and that it provides the expected outputs. Pass, fail, busy and associated light and/or audible indications. They add the tester to their PM schedule and it is ready to use. This may vary by company but my survey of two companies found the same processes in place.
What is the accuracy of my test timer?
What are the specifications on my leak standards?
How do I adjust the span on my electronic regulator?
How do I calibrate my leak standard?
What is a chamber test?
How do I change a Display?
How do I change a pressure sensor?
What are clamps?
What is a crack test?
How do I collect data over RS232?
What are Kp and Ki?
How do I set test pressure on my electronic regulator?
What is a back pressure test?
How do I troubleshoot a leak in my system?
Tech-Note – Troubleshooting Internal Leaks – Type 2Valves HD
Tech-Note – Troubleshooting Internal Leaks – Type 2Valves
Tech-Note – Troubleshooting Internal Leaks – Type 3Valves HD
Tech-Note – Troubleshooting Internal Leaks – Type 3Valves
Tech-Note – Troubleshooting Internal Leaks – ASCO Valves
Tech-Note – Troubleshooting Internal Leaks – Type 1Valves HD